High fidelity and low fidelity !

Iam reminding the difference between high fidelity and low fidelity. The different between high fidelity and low fidelity is because a high-fidelity prototype is computer-based, and usually allows realistic (mouse-keyboard) user interactions. whereas, a low-fidelity prototype is usually paper-based, could possibly be a series of sketches or printouts, and does not allow realistic user interactions. If i compared both of them low fidelity is easy where high fidelity is hard but the user can entry the fields and test it for real.